Voters leave the polls after casting their ballot on Tuesday, March 8, 2016 during the Michigan primary at Mott Community College in Flint. Jake May | MLive.com

With only a few months left until the November general elections, outside groups are starting to turn their attention to several Michigan races.

Welcome to Airtime, MLive's occasional segment on the latest political ads in Michigan races. Today, we're looking at new ads in the 8th Congressional District, the governor's race and U.S. Senate.

New ad from national PAC critical of Bishop's record

On Tuesday, the group House Majority PAC - a national group focused on electing more Democrats to Congress - announced a new ad Tuesday in the 8th Congressional District that paints incumbent U.S. Rep. Mike Bishop, R-Rochester, as "what's wrong with Washington."

The ad states that Bishop joined a lobbying firm the same year Democratic challenger Elissa Slotkin joined the Department of Defense. The ad is also critical of Bishop's health care record in Congress.

The ad buy totals more than $170,000 and will run in the Lansing media market, according to the House Majority PAC.

Bishop's campaign claims home turf

In a minute-long audio ad, a narrator highlights Bishop's commitment to the 8th District and criticizes Slotkin for coming back from Washington, D.C. to run for Congress.

"How can Elissa Slotkin know us?" the narrator says.

The ad highlights Bishop's knowledge of Michigan and his work to address the opioid crisis and environmental issues.

"Mike Bishop knows Michigan and has a record of working with both parties to solve problems," the ad's narrator says.

Slotkin up with first TV ad of her own

Slotkin recently went up with her first television ad in the 8th Congressional District, focusing on what "service" means to her.

Slotkin says in the ad she joined the CIA after 9/11 and served three tours in Iraq, and "took the safety of our troops and our homeland personally."

"For me, service was working for two presidents, one from each party," she says in the ad. "I approve this message because we need members of Congress who remember it's about service to country, not themselves."

Republican Governors Association says Whitmer is 'Just like Granholm'

In the governor's race, the Republican Governors Association, which supports Republican candidates for governor around the country, put up an ad taking on the mantra that Gretchen Whitmer would be a repeat of Jennifer Granholm.

"Michigan has made a comeback, so why would we turn back now?" the ad's narrator states. "Michigan can't afford to go back to the failed policies of Jennifer Granholm and Gretchen Whitmer...Gretchen Whitmer is just like Jennifer Granholm, and Michigan can't afford to lose another decade."